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drm/i915/edp: Flush the write before waiting for PLLs

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Chris Wilson 2010-08-07 11:01:36 +01:00 committed by Eric Anholt
parent 913d8d1100
commit 5ddb954b9e
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/intel_display.c
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@ -1665,6 +1665,7 @@ static void ironlake_enable_pll_edp (struct drm_crtc *crtc)
dpa_ctl = I915_READ(DP_A);
dpa_ctl |= DP_PLL_ENABLE;
I915_WRITE(DP_A, dpa_ctl);
POSTING_READ(DP_A);
udelay(200);
}